#include <stdio.h>

int main() {
    int score = 0;

    scanf("%d", &score);

    int level = score / 10;
    switch (level) {
        case 10:
        case 9:
            printf("甲等");
            break;
        case 8:
            printf("乙等");
            break;
        case 7:
            printf("丙等");
            break;
        default:
            printf("没有奖金~");
            break;
    }

}